University of Utah

Professor of Mathematics, Barnard College, Columbia University

Professor of Mathematics, University of California, Davis

Emeritus Professor, University of Illinois at Chicago

Professor of Mathematics, University of Chicago

Powell Chair and University Distinguished Professor, Texas A&M University

Professor of Mathematics, Hunter College of CUNY and the Graduate Center of CUNY

Professor of Mathematics, Brandeis Univesity

Professor Emeritus of Mathematics, Virginia Tech

Emeritus Professor of Mathematics, University of Southampton